Gas and air mixing device



June 18, 1935. M. F. KOWALSKI GAS AND AIR MIXING DEVICE Filed July 18, 1934 z 3 m f m v J 4 z w. m X H 2 w w 3% INVENTOR i A 1 /Zflfawa/sh 35 w ATTORNEY WITNESSES Patented June 18, 1935 UNITED STATES PATENT 1 Claim.

This invention relates to a gas and air mixing device which is useful in conjunction with fuel feeds of internal combustion engines.

An object is the provision of a device of the indicated character which is operable in response to the operation of a speed control means to furnish variable amounts of freshair, according tothe revolutions per minute of an engine, so as to give a stronger and more vaporized charge and thereby increase the power of the engine while economizing the use of fuel, at all speeds above idling speed of the engine.

Another object of the invention is the provision of a device as characterized above, having adjustable meanswhereby the device will operate with the control means, such as accelerator and throttle rods, of all standard carburetors.

Further objectsof the invention areto pro vide a vaporizer attachment which is simple in its construction and arrangement, compact, thoroughly efiicient in use, readily installed, inexpensive, and of substantial design.

With the foregoing, other objects of the invention will appear from the embodiments of the invention which, by way of example, are described in the following specification and illustrated in the accompanying drawing, in which Figure 1 is a side view showing the device in use in conjunction with a carburetor and intake and carburetor operating means, the carburetor, intake and said means being shown in dot and dash lines.

Figure 2 is an enlarged section on the line 2-2 of Fig. 1.

Figure 3 is a section on the line 3 -3 of Fig. 2.

Figure 4 is a fragmentary horizontal section showing another embodiment of the invention.

The invention is useful with systems for feeding atomized or vaporized fuel to an internal combustion engine, and in the drawing, by way of example, there is shown conventionally in dot and dash lines a carburetor l0 and main fuel mixture intake ll of the usual manifold which communicates with the mixing chamber of the carburetor, and an accelerator rod l2 which is connected with the usual butterfly or throttle valve member l3, all of which constitute parts of such a system. The device in the form of an attachment is designed and adapted to be readily installed between the mixing chamber of the carburetor l0 and the fuel intake ll, these elements usually being provided, respectively, with flanges l4 and IS. The device is secured in operative position by reason of these fianges M and I5, and is operated in response to the accelerator rod I2 to admit cool air into the fuel stream in a properly proportioned incr-eased amount as the speed of the engine increases and the suction becomes greater. 5

One embodiment of the invention is shown in Figures 1, 2 and 3, the vaporizer itself being shown most clearly in Figures 2 and 3. The device includes a part or member if in the form of a gasket, the same being" preferably made of metal 1 0 and of a size and shape to fit between the flanges i l and to conform'thereto. The part l6 has an opening ll through which the vaporized liquid fuel may pass since it will be disposed'in registry with the outlet end of the mixing'chamber of the 15 carburetor and the intake H. The part it also has holes It therein to accommodate securing elements H! which extend through the fianges M and I 5. The part It has formedYintegral therewith a cup :28 which has a conical wall 2!. The part it also has a plurality of passages ZZ'arranged in a single plane'and in spaced relation to each other. Each passage 22 communicates at its inner end with the opening H and at its outer end within the interior of the cup 21}. The device also includes an air inlet valve which consists of a tubular member 23 of suitable length, and a valve member 2 which slidably fits in the tubular member 23. The tubular member 23 is open at each end so as to receive the valve member 25 therein, and also to admit air. The tubular member 23 also has a plurality of ports 25 of varying sizes and arranged in spaced relation to each other. A boss 2% is arranged on the tubular member 23, and a cup 21 surrounds this boss 26 and is adapted to fit over the cup 20 to form a distributing chamber 28. A screw 29 extends through a bore in the part It and is threaded in a tapped bore in the boss 26 to secure the cup 2? to the cup 20, and thus secure the air inlet valve to the part it. The ports 25 will be in communication with the chamber 28, and this chamber will be in communication with the passages 22. An air distributing means in the form of a screen 38 is arranged within the chamber 28 and is held in position by the cups 2B and 21 in proximity to the ports 25 to spread or distribute the air passing through the ports 25 from the atmosphere as the valve member 2 is operated. The outer end of the valve member 24 is pivotally connected, as at 3|, with one end of a link 32 whose opposite end is pivotally connected, as at 33, with the clip 34 on the accelerator rod [2. The parts are adjusted so that the valve, or in other words all of the ports 25, will be closed with the carburetor adjusted to deliver a proper amount of fuel for idling purposes.

From the foregoing it will be understood that there has been described a device in the form of an attachment which will operate in response to the operation of a speed control means, such as the accelerator rod I2, to furnish variable amounts of fresh air into the fuel stream on its way to the engine, not shown. As the accelerator rod is moved to increase the speed of the engine, one of the ports 25, the smallest thereof, will be uncovered by reason of the movement of the valve member 24, thereby admitting a certain additional supply of air to the fuel mixture on its way to the intake H. As the throttle valve member 13 is operated by the rod l2 the speed" of the engine increases and the suction becomes greater, as ,is Well known, and due to this action a properly proportioned increase of air will be admitted through the device into the fuel stream to be mixed. therewith and thereby improve the vaporization ofthe fuel to increase the engine power and achieve a smoother all-round performance at all speeds above idling speed of the engine.

, By loosening the screw 29 it is possible to adjust the cup 27 or, in other words, to turn it at an angle so as to change the angle of the tubular member 23, so that the valve member 24 may be operated with various types of control means, such as the accelerator and throttle rods, disposed at diiierent angles according to the types of carburetors used.

In Figure 4 there is shown a further embodiment of the invention inan extremely simple form. In this embodiment of the invention the cups 2!) and 21, screw 29 and screen 30 of the deviceshown in Figure 2 are omitted, and an air inlet valve is' provided whose tubular member 35 is formed integral with the gasket 36. Passages 31 in the gasket 36 communicate with an opening 38, similar to the opening l1, and with the interior of the tubular member 35. The tubular member 35 has air inlet ports 39 gradually increased in size from one end of the tubular member to the other. One end of the tubular member 35 is closed by a Wall 49 and a valve member M is slidable in the tubular member 35 and projects from the other end thereof. The projecting end of the valve member 4| will be connected with a control member, suchas the rod 12, in a manner as hereinbefore described to operate the valve member 4!. This form of device has substantially all of the advantages of the other form of device described.

It is to be understood that the invention is not restricted to the precise arrangement of parts shown and described, as details of construction may be modified and rearranged without depart- :ing-from the spirit of the invention, the scope of which is limited only by the terms of theappended claim; Y

What I claim is: I

Agas and air mixingdevice comprising a part having means for securing "it in place andprovided with an open mixing passage i'or mixing vaporized liquid fuel and air, said part having'a, plurality of air passages therein communicating with said mixing passage, a tubular member, com plemental cups on said first part and the tubular member respectively, and together forming a chamber, means to detachably secure'the cups to each other, said air' passages communicating with said chamber, said tubular member. having a plurality of air inlet ports therein communicating with said chamber, and a valve member slid;- able in said tubular member to open and. close said air passages and ports, to control the inflow of air through said tubular member, ports, chain'- ber and passages into said mixing passage;

. MARION F. fKOWAISKI. 

